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Probing:
* Probing DNS for Kerberos and LDAP configuration. To be added as a button
for one-time use.
- Use SRV RRs for LDAP, a la nss_ldap:
_ldap._tcp.<DOMAIN> = priority weight port server (see RFC 2782)
Convert <DOMAIN> to base DN using DC components in the way just
about everything does (example.com -> "dc=example,dc=com")
- Use SRV RRs for Kerberos realms, a la locate_kdc.c:
_kerberos._udp.<REALM> = priority weight port server (see RFC 2782)
We have the realm, a server name, and the port number. Use all of them.
_kerberos-master._udp.<REALM> = priority weight port server (see RFC 2782)
We have the realm, the admin server name, and the port number.
* Probing for NIS servers and domains using broadcast RPC (servers can be done
by calling the NULL function for the ypserv program, and we've only got
YPPROC_DOMAIN for checking if a server supports a given domain). To be
added as a button for one-time use.
* An easy-to-parse way to dump what we think the current configuration is (for
anaconda to use if we want to add probing for default options at
install-time).